Why not ask your current clients about what they would be interested in before deciding? That's what I did. All my clients having facials are mature with a couple of exceptions.
Mine wanted micro-current, galvanic and luxury massage based facials.
I would love to have Dermalux, but as I am so close to winding down I shall not pursue that device because I am more conservative with my money since Covid damaged my business.
See how you go on with making a few suggestions to them and they will be so excited to try your "new" treatments, you won't need to panic about hard selling.
My clients felt rather special about my asking what their preferences were and booked in to try them out as soon as they could.
Best of luck